Spark-plug tool



INVENTOI? ATTORNEYS J. LOPEZ SPARK PLUG TOOL March 11, 1924.

Filed Aug. 11. 1921 i, i i 5 I i JOSEPH LGPEZ, OF NEW] N. T

. iQSSIC-TNQR- JOSEPIi LOPEZ CORPORATION,

QGR'EOEATIQH.

Application. filed August 1;, 1221. Serial No. @1363.

To aZZ whom it an concern:

Be it l"1OW11 that nz a c ti- Jl'll at flew plugs, and a unitarystructure an im the points of spark-plug gagged. and tested.

A good u erstanding of the invention may be had in the followindescription rorni of embodiment thereof, reference being had to theaccompanying drawin in which;

Figure 1 a side elevation of one form or" tool embodying my invention;

Fig. 2 is a front elevation of the tool of Fig. 1, shown in operativeposition for testing a spark-plug; and

Fig. 3 is a section of Fig. 2 on line 3-3, looking in the direction ofthe arrows.

In the drawing, reference numeral 1 designates a handle preferably ofwood or other insulating material, provided at its upper edge with awire bristle brush 2, the bristles being mounted in the handle in anysuitable manner. At its opposite end the handle is provided with adouble-edged, pointed blade 8', this blade being mounted in the handleby means of an inner portion 3 integral with the blade and embedded inthe material of the handle. Intermediate its ends the tool is providedwith a sheet-metal gage 4 having a thickness equal to the distance atwhich it is desired to set the points of spark-phi gs. This gage ismounted on the handle by being partially embedded in the materialthereof, as best shown in 2. The embedded portions of 3 and i arepointed to form electrodes 3 and 4: which extend into an opening 5 inthe handle, these electrodes being spaced from each. other the properdistance for forming a test spark The manner in which the blade 3 andthe gage t are embedded in the handle is preferably by sharpening thetapered edges 6 thereof, and thereupon hammering or other wise drivingthem into the material of the iandle, until the electrode points are theproper distance apart in opening 5. The frictional engagement betweenthe material he handle and the embedded portions 1 be sufficient toretain the l in their proper positions, as illustrated in Fig. 1. Whende sired, however, additional security may be had by means of pins 1'(Figs. 2 and 3), the ends of which are preferably countersunk and filledwith insulating material so as to prevent shocl: to the user of theinstrument, when the same is employed for testing, as hereinafterdescribed. When the handle is rde of molded material the members 3 and lw l of COU""G be placed into their proper position dui e the moldingoperation.

The manner a. which the tool is used will now be readily understood. Bymeans of the wire brush the mechanic effects a general cleansing of thevarious parts or" the plug. 7 then employs the pointed blade 3 forscraping the terminals of the plug and pick g oil small particles ofcarbon or other reign matter lodged in the recesses thereof. l" thenuses the gage 4 to determine whether the points of the plu are set theproper distance apart, and makes any adjustment found necessary. He maythen test the plug by placing the gage member against the upper terminalof the spark plug, the point of the blade 3 being rested on a part oithe casing of the motor or other surface having electrical connectionwith the base of the plug. By applying potential to the plug andobserving the test spark ga 3 lhe is able to ascertain whether thedesired spark being obtained.

It will thus be observed that the tool of the present invention is ofextraordinarily simple and inexpensive construction, nevertheless beingcapable of performing all the various operations necessary for acomplete cleansing, gaging, and testing of the sparklug.

Although I have herein shown and de- .cribed only one specific form ofembodiment of my invention, it will be readily understood that manychanges and modificaions may be made therein without departsaid membersin and ing from the spirit and scope of the inven tion, it being myintention to claim the same broadly in whatever form its principle maybe employed.

i /hat I claim is:

1. In a tool of the character described, a handle provided with anopening, a pair of conducting members associated with said handle andprojecting into said opening to form a test spark gap, one of saidconducting members comprising a blade'portion extending from the end ofthe handle, and the other of said members comprising a portion extendingfrom the side of the handle, the extending portions forming contactmembers for the testing of spark plugs.

2. A sparloplug tool, consisting of a handle of insulating materialprovided With an opening, a scraping and picking blade mounted in saidhandle and provided With a pointed member extending into said opening, agage mounted in said handle and provided With a pointed member extendinginto said opening, the points of said members being spaced at sparkingdistances from each other.

3. In a tool of the character described, a handle of insulatingmaterial, a scraping blade member, and a spark-gap gage memberassociated With said handle, each of said members being formed of sheetmaterial partially embedded in the material of the handle andfrictionally retained therein.

In testimony whereof I have aflixed my signature to this specification.

' JOSEPH LOPEZ.

